---
author: hongbo
date: "2017-10-05"
previewImg:
badge: release
title: Announcing BuckleScript 1.5.1
description: |
---

## Features

1. [FFI: Unicode literal
   support](http://bucklescript.github.io/bucklescript/Manual.html#_unicode_support_since_1_5_1)
2. [FFI: return value
   checking](http://bucklescript.github.io/bucklescript/Manual.html#_unicode_support_since_1_5_1)
3. [FFI: Detect global variable
   existence](http://bucklescript.github.io/bucklescript/Manual.html#_detect_global_varialbe_existence_code_bs_external_code_since_1_5_1)

## Minor breaking changes

1. changes NodeJS special variables from `module_` to `_module` to make it more consistent
2. [%node ] return [_ option] type instead of `undefined`
